| ADAMSEDGWICK | 19th-century English geologist who proposed and named the Cambrian period, part of the Palaeozoic era (4,8) |
| WARREN | Senator who proposed and championed the creation of the Consumer Financial Protection Bureau |
| EDO | ___ Period (part of Japanese history) |
| IGUANODON | Dinosaur named in 1825 by the English geologist Gideon Mantell (9) |
| BUCKLAND | Where deer might have roamed according to an old English geologist (8) |
| ORDOVICIAN | Following just after the Cambrian Period, this period saw the evolution of compact insect-like marine animals called trilobites. |
| PRECAMBRIAN | Long time interval that came "before" the Cambrian Period. |
| EPOCH | Period part |
| EOCENE | Tertiary Period part |
| PERMIAN | Of or relating to the last period of the Palaeozoic era, between the Carboniferous and Triassic periods (7) |
| ARTHUREVANS | English archaeologist who discovered and named the Bronze Age Minoan civilisation of Crete in the early 20th century (6,5) |
| DEVONIAN | Of a period of the Palaeozoic era between 415 and 360 million years ago (8) |
| SILURIAN | Geologic period between the Ordovician and Devonian periods of the Palaeozoic era |
| CAMBRIAN | The first geological period of the Palaeozoic era, during which marine invertebrates flourished (8) |
| GOLD | Precious metal mined by the Romans some 2,000 years ago in the mines of the Cambrian mountains (4) |
| PWLLHCLI | Resort on the Llyn peninsula, the terminus of the Cambrian Coast railway line (8) |
| EVANS | Sir Arthur ___, British archaeologist, who excavated Knossos and named the Minoan civilisation (5) |
| GELLMANN | Murray ___, US physicist who investigated and named the quark; Nobel Prize in Physics (1969) (4-4) |
| NICOLAUSSTENO | Danish geologist who first realised that fossils are the remains of ancient living organisms (8,5) |
| SPHINX | With the head of a woman and the body of a lioness, a mythological Greek monster who proposed riddles to travellers (6) |
